Current: 

• Managing and restoring aquatic ecological corridors for migratory fish species in the Danube River Basin – MEASURES,Danube Transnational Programme (Member).
• Mass removal of the black bullhead (Ameiurus melas) – Possibilities for self-sustaining commercial farming in Serbia”(2020-2021), Rufford – member.

Past:

• COST Action FA1304 FITFISH – Swimming of fish and implication for migration and aquaculture         COST (European Cooperation in Science and Technology) – member.
• Black bullhead (Ameiurus melas) in Ponjavica Nature Park: biological characteristics, effects on native ichthyofauna, mass removal and experimental rearing, Rufford Foundation – member.
• JNOP 01/ 2018 Pribavljanje podataka i druge usluge u cilju nastavka uspostavljanja ekološke mreže u Republici Srbiji – member.
• JNOP 02/ 2018 Pribavljanje podataka i druge usluge u cilju uspostavljanja ekološke mreže Evropske unije Natura 2000 kao dela ekološke mreže Republike Srbije – member
• JNOP 03/ 2018 Pribavljanje podataka i druge usluge u cilju nastavka izrade crvenih lista pojedinačnih grupa organizama flore, faune i gljiva u Republici Srbiji – member.
• Operativni monitoring površinskih i podzemnih voda Republike Srbije, Partija 1 – Operativni monitoring površinskih voda (2018-2019) – member.
• Operativni monitoring površinskih i podzemnih voda Republike Srbije – Partija 1 – Operativni monitoring površinskih voda (2017 – 2018) Ministarstvo zaštite životne sredine Republike Srbije – member
• OI173045 Fishes as water quality indicators in open waters of Serbia Ministry of Education, Science and Technological Development of the Republic of Serbia – member
• TR37009 Monitoring and Modeling of Rivers and Reservoirs (MORE) – Physical, Chemical, Biological and Morphodynamic Parameters            Ministry of Education, Science and Technological Development of the Republic of Serbia – member
• COST Action ES1201 Network Lake Observations in Europe (NETLAKE) COST (European Cooperation in Science and Technology) – participant

1. Sunjog K., Kolarević S., Kračun-Kolarević M., Višnjić-Jeftić Ž., Gačić Z., Lenhardt M., Vuković-Gačić B. (2019). Seasonal variation in metal concentration in various tissues of the European chub (Squalius cephalus L.). Environmental Science and Pollution Research, 26: 9232–9243. – ID=1543
2. Subotić S., Višnjić-Jeftić Ž., Đikanović V., Spasić S., Krpo-Ćetković J., Lenhardt M. (2019). Metal Accumulation in Muscle and Liver of the Common Nase (Chondrostoma nasus) and Vimba Bream (Vimbavimba) from the Danube River, Serbia: Bioindicative Aspects. Bulletin of Environmental Contamination and Toxicology 103(2): 261–266. – ID=1588
3. Smederevac-Lalić M., Kalauzi A., Regner S., Navodaru I., Višnjić-Jeftić Ž., Gačić Z., Lenhardt M. (2018). Analysis and forecast of Pontic shad (Alosa immaculata) catch in the Danube River. Iranian Journal of Fisheries Sciences, 17(3):443-457 – ID=1553
4. Lenhardt M., Đikanović V., Hegediš A., Višnjić-Jeftić Ž., Skorić S., Smederevac-Lalić M. (2018). Qualitative and Quantitative Changes in the Ichtyofauna of the Danubian Reservoirs After the Construction of the Iron Gates Hydropower Plant Dams (Proceedings Paper). Ecological and economic significance of fauna of Serbia, 171: 143-172. – ID=1554
5. Kostić J., Kolarević S., Kračun-Kolarević M., Aborgiba M., Gačić Z., Paunović M., Višnjić-Jeftić Z., Rašković B., Poleksić V., Lenhardt M., Vuković-Gačić B. (2017). The impact of multiple stressors on the biomarkers response in gills and liver of freshwater breams during different seasons. Science of the Total Environment 601: 1670-1681. – ID=1558.